<header class="header_area">
    <div class="main_menu">
        <nav class="navbar navbar-expand-lg navbar-light">
            <div class="container box_1620">
                <!-- Brand and toggle get grouped for better mobile display -->
                <a class="navbar-brand logo_h" href="/www/index.html"><img src="/www/img/logo.png" alt=""></a>
                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <!-- Collect the nav links, forms, and other content for toggling -->
                <div class="collapse navbar-collapse offset" id="navbarSupportedContent">
                    <ul class="nav navbar-nav menu_nav">
                        <li class="nav-item active"><a class="nav-link" href="/">首页</a></li> 
                        <!-- <li class="nav-item"><a class="nav-link" href="/www/category.html">Category</a></li>
                        <li class="nav-item"><a class="nav-link" href="/www/archive.html">Archive</a></li>
                        <li class="nav-item submenu dropdown">
                            <a href="/www/#" class="nav-link dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Pages</a>
                            <ul class="dropdown-menu">
                                <li class="nav-item"><a class="nav-link" href="/www/single-blog.html">Sinlge Blog</a></li>
                                <li class="nav-item"><a class="nav-link" href="/www/elements.html">Elements</a></li>
                            </ul>
                        </li> 
                        <li class="nav-item"><a class="nav-link" href="/www/contact.html">Contact</a></li> -->
                    </ul>
                    <ul class="nav navbar-nav navbar-right header_social ml-auto">
                        <!-- <li class="nav-item"><a href="/www/#"><i class="fa fa-facebook"></i></a></li>
                        <li class="nav-item"><a href="/www/#"><i class="fa fa-twitter"></i></a></li>
                        <li class="nav-item"><a href="/www/#"><i class="fa fa-dribbble"></i></a></li>
                        <li class="nav-item"><a href="/www/#"><i class="fa fa-behance"></i></a></li> -->
                    </ul>
                </div> 
            </div>
        </nav>
    </div>
    <div class="logo_part">
        <div class="container">
            <a class="logo" href="/www/#"><img src="/www/img/logo.png" alt=""></a>
        </div>
    </div>
</header>